
<template>
    <div class="appContent">
        <!-- 顶部Header区域 -->
        <mt-header fixed title="固定在顶部">
			<span slot="left" @click="goBack">
				<mt-button icon="back" v-show="flag">返回</mt-button>
			</span>
		</mt-header>
        <!-- 中间的路由 router-view 区域 -->
		<transition>
        	<router-view></router-view>
		</transition>	
        <!-- 底部的Tabber 区域 -->
        <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-cjf" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-cjf" to="/member">
				<span class="mui-icon mui-icon-email"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-cjf" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
					<span class="mui-badge" id="badge">{{ this.$store.getters.getAllNum }}</span>
				</span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-cjf" to="/search">
				<span class="mui-icon mui-icon-gear"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
    </div>
</template>    
<script>
export default{
	data(){
		return {
			flag:false
		}
	},
	created(){
		// 在页面生成 或 刷新时 判断是否在/home
		this.flag = this.$route.path === '/home'?false:true;
	},
	methods:{
		goBack(){
			//  点击后退
			this.$router.go(-1);
		}
	},
	watch:{
		// 监听 path  如果等于/home 则 不显示 '返回'
		'$route.path':function(newVal){
			console.log(this.flag);
			if (newVal === '/home') {
				this.flag = false;
			}else{
				this.flag = true;
			}
		}
	}
}
</script>
<style lang="less" scoped>
    .appContent{
		padding-top:40px;
		padding-bottom: 50px;
		// 去除滚动条
		// 只能是x  因为内容y轴会很长
		overflow-x: hidden;
	}
	.mint-header{
		z-index: 999;
	}
	
	.v-enter{
		opacity: 0;
		transform: translateX(100%);
	}
	.v-leave-to{
		opacity: 0;
		transform: translateX(-100%);
		// 标签离开的时候 不会出现上下浮动
		position: absolute;
	}

	.v-enter-active,
	.v-leave-active{
		transition: all 0.3s ease;
	}

	// 修改tabber中a标签的类名 解决 min.js中 类名=mui-tab-item 的冲突
	.mui-bar-tab .mui-tab-item-cjf.mui-active {
		color: #007aff;
	}
	.mui-bar-tab .mui-tab-item-cjf {
		display: table-cell;
		overflow: hidden;
		width: 1%;
		height: 50px;
		text-align: center;
		vertical-align: middle;
		white-space: nowrap;
		text-overflow: ellipsis;
		color: #929292;
	}
	.mui-bar-tab .mui-tab-item-cjf .mui-icon {
		top: 3px;	
		width: 24px;
		height: 24px;
		padding-top: 0;
		padding-bottom: 0;
	}
	.mui-bar-tab .mui-tab-item-cjf .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style> 